Which of the following best describes how the flu virus may impact the respiratory system?
A. The proteins produced by the virus interfere with ability of epithelial cells to move materials in and out of lung tissue, resulting in fluid buildup in the lungs.
B. Epithelial cells see an increase in function as they try to adapt to the viral load of surrounding cells.
C. The immune system prompts a decrease in blood flow, which results in the lungs becoming dry. A hacking cough can be produced.
D. All of the answer choices are correct.
Answer: A
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What type of bonding is responsible for maintaining the shape of the tRNA molecule shown in the figure above?
A) covalent bonding between sulfur atoms B) ionic bonding between phosphates C) hydrogen bonding between base pairs D) van der Waals interactions between hydrogen atoms E) peptide bonding between amino acids
The enzyme produced by the pancreas for the breakdown of lipids is pancreatic ________ .
Fill in the blank(s) with the appropriate word.
In both field and lab studies of guppies, you observe a rapid evolutionary change in the physiological traits that help the animals avoid predation. This observation illustrates which main points? (Select all that apply.)A) Allele frequency is maintained in all conditions.B) Natural selection is an ongoing process.C) Dominant genes will always increase survival rates.D) Evolutionary change is facilitated by natural selection.
What will be an ideal response?
Huntington's observations of the disease that later took his name were published prior to the rediscovery of Gregor Mendel's work on inheritance. Support the argument that Huntington was describing a phenotype with complete dominance
What will be an ideal response?